Canon PowerShot S1 IS User Manual (en)

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Troubleshooting
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4. Select your camera model name or [Canon Camera], right-click and select 
[Delete].
5. Click [OK] in the confirmation dialog.
Delete all instances of your camera model name or [Canon Camera] if it 
appears in one or more places in the [Other devices] or [Imaging devices] 
categories.
6. Close the System Properties window.
< Delete the setup information files>
7. Double-click the [My Computer] icon on the desktop, followed by the [C:] 
drive, [Winnt] folder and [Inf] folder.
There are other potential reasons for the problem if the “Other devices” 
or “Imaging devices” categories do not appear or your camera model 
name or [Canon Camera] does not appear. Proceed to Step 6, 
temporarily quit the procedures and investigate the other potential 
causes.
Step 7 and above are not required for Windows XP.
If the [Inf] Folder Is Not Visible in the [Winnt] Folder
Use the following procedures to show all files and folders.
1. Open the [Winnt] folder.
2. Click the [Tools] menu and select [Folder Options].
3. Click the [View] tab.
4. In the [Files and Folders] category in the Advanced Settings section, set [Hidden files 
and folders] to [Show hidden files and folders]. Remove the check marks from [Hide 
file extensions for known file types] if it is present.
5. Click [OK] to close the dialog.
This will make the hidden files and folders visible.